if ((navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 3) || parseInt(navigator.appVersion) >= 4) {
    rollOvers = 1;
} else {
    rollOvers = 0;
} 
var dirLevel = 1;
var levelMod = "";
levelMod = "";
for (i = 0;i < dirLevel;i++) {
levelMod += "";
} 
if (rollOvers) {

        a1On = new Image(106, 39);
   		a1On.src = levelMod + "/img/service_s.gif";
		a1Off = new Image(106, 39);
   		a1Off.src = levelMod + "/img/service_g.gif";
		
		a2On = new Image(106, 39);
   		a2On.src = levelMod + "/img/about_s.gif";
		a2Off = new Image(106, 39);
   		a2Off.src = levelMod + "/img/about_g.gif";	
			
		a3On = new Image(106, 39);
   		a3On.src = levelMod + "/img/contacts_s.gif";
		a3Off = new Image(106, 39);
   		a3Off.src = levelMod + "/img/contacts_g.gif";
							
		
} 
function switchOn(imgName) {
    if (rollOvers) {
imgOn = eval(imgName + "On.src");
document [imgName].src = imgOn;
    }
} 
function switchOff(imgName) {
    if (rollOvers) {
imgOff = eval(imgName + "Off.src");
document [imgName].src = imgOff;
    }
}